Majority of music only goes down to 40hz. When I say "majority of music" I really mean MAJORITY. That includes whatever "what if" genres you can name. Play static noise or test CD's that help you identify fundamentals and you'll know what I mean. If you're all about anything below 40hz, luckily, your vehicle gain helps a lot. But it can also help to muddy up the sound. Getting that tight "kick in the chest" bass is nice and what most people want and that's not "deep bass".